This is really only going to apply to those of you who have raw water circulation. This past weekend I winterized my boat, and I just want to pass on a few tips from some issues that surfaced during my process. When I was removing all the blue plastic drain plugs, I noticed that a good amount of water exited the manifolds, but when removing the ones in the engine block, I observed the same flow amount of water exit, but then started quickly slowing down, then stop. I do have quite a bit of GM V6/V8 experience, and I was thinking to myself "I think I should have seen much more water exit the block drains. Good thing I questioned myself, I took a small screwdriver and probed the block drains, and some thick rusty sedimant debris was blocking the drain (on BOTH sides of the block). So after a few min. of poking, I got all the water and debris out. Then the second issue was when I went to re-install the plastic plugs, one of the manifold plugs snapped off while I was trying to tighten it. Ahhhh friggin' dammit!!!!! The threaded portion was still in the manifold. I ended up using a 3/16" allen key, with the tip heated up hot with propane, and melted the broken portion of the plug, and removed it. My local marine parts store had those plugs, and commented they snap all the time.... So happy winterizing!
Rich
Rich